Poor: Disinfectant and/or microbial levels in treated water frequently out of specification.

差：处理水的消毒和/或微生物水平经常超出标准。

youdao

Once the dolphin figured out the result of pressing this new paddle, it did choose it frequently when the trial was difficult.

一旦海豚发现了按这个新踏板的结果，当测试难度非常高时，它就会很频繁地按这个踏板。

youdao

Consider selling inexpensive items that businesses use everyday and frequently run out of such as pens, pencils, erasers etc.

考虑一下卖些不贵但公司又常用的损耗品比如钢笔、铅笔、橡皮等等。

youdao

"The unanticipated consequence is that people are now crossing less frequently and have to wait one to two hours coming in and out of our ports of entry."

VOA: standard.2010.04.21

And I'll just point out here also, this is a conversion factor you'll use quite frequently -- many of you, quite on accident, will memorize it as you use it over and over again.

你们会经常用到，所以你们可能,会不小心记住它的值，但我们并不会在,任何考试中。

麻省理工公开课 - 化学原理课程节选

And my real answer is, go try it out, because obviously you can tell I frequently do this the wrong way and the TAs give me a hard time every time. John.

你可以，而我真正的答案是去试一试吧,因为很明显你可以发现我老是做错,而我的助教总是给我难堪，约翰。

麻省理工公开课 - 计算机科学及编程导论课程节选

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